Not Medical Advice: Bee or Yellow Jacket sting severe pain or burning at the site lasts 1 to 2 hours, and itching often follows the pain. Normal swelling from venom can increase for 24 hours after the sting.
Stings of the upper face can result in severe swelling around the eye, however this is harmless. Stings normally become red, but it doesn't mean they are infected; infections seldom occur in stings. The redness can last 3 days and the swelling can last for 7 days.
Yellow Jacket is a type of ground-nesting wasp; they are much more aggressive than bees. Yellow jackets are carnivores and are feeding mostly on insects to provide protein to developing larvae in their colony.
They often nest underground in rodent burrows and by late summer, a colony may already contain thousands of individuals that will aggressively protect their nests from intruders. Every yellow jacket can sting multiple times; sounds and vibrations can initiate an attack, even from a distance.
Learn Bee & Wasp Sting: Treatment and First Aid at WebMD.